Escherichia coli isolates from patients with inflammatory bowel disease: ExPEC virulence- and colicin-determinants are more frequent compared to healthy controls
Language English Country Germany Media print-electronic
Document type Journal Article
PubMed
29735381
DOI
10.1016/j.ijmm.2018.04.008
PII: S1438-4221(17)30516-7
Knihovny.cz E-resources
- Keywords
- Bacteriocin, Crohn’s disease, E. coli, Phylogenetic group, Ulcerative colitis, Virulence,
- MeSH
- Bacterial Toxins genetics MeSH
- Bacteriocins metabolism MeSH
- Crohn Disease microbiology MeSH
- Escherichia coli genetics isolation & purification metabolism MeSH
- Extraintestinal Pathogenic Escherichia coli isolation & purification pathogenicity MeSH
- Humans MeSH
- Oxo-Acid-Lyases genetics MeSH
- Fimbriae Proteins genetics MeSH
- Escherichia coli Proteins genetics MeSH
- Electrophoresis, Gel, Pulsed-Field MeSH
- Gastrointestinal Microbiome physiology MeSH
- Colitis, Ulcerative microbiology MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- aerobactin synthetase MeSH Browser
- Bacterial Toxins MeSH
- Bacteriocins MeSH
- cytotoxic necrotizing factor type 1 MeSH Browser
- fimbrillin MeSH Browser
- Oxo-Acid-Lyases MeSH
- Fimbriae Proteins MeSH
- Escherichia coli Proteins MeSH
A set of 178 Escherichia coli isolates taken from patients with inflammatory bowel disease (IBD) was analyzed for bacteriocin production and tested for the prevalence of 30 bacteriocin and 22 virulence factor determinants. Additionally, E. coli phylogenetic groups were also determined. Pulsed-field gel electrophoresis (PFGE) was used for exclusion of clonal character of isolates. Results were compared to data from a previously published analysis of 1283 fecal commensal E. coli isolates. The frequency of bacteriocinogenic isolates (66.9%) was significantly higher in IBD E. coli compared to fecal commensal E. coli isolates (54.2%, p < 0.01). In the group of IBD E. coli isolates, a higher prevalence of determinants for group B colicins (i.e., colicins B, D, Ia, Ib, M, and 5/10) (p < 0.01), including a higher prevalence of the colicin B determinant (p < 0.01) was found. Virulence factor determinants encoding fimbriae (fimA, 91.0%; pap, 27.5%), cytotoxic necrotizing factor (cnf1, 11.2%), aerobactin synthesis (aer, 43.3%), and the locus associated with invasivity (ial, 9.0%) were more prevalent in IBD E. coli (p < 0.05 for all five determinants). E. coli isolates from IBD mucosal biopsies were more frequently bacteriocinogenic (84.6%, p < 0.01) compared to fecal IBD isolates and fecal commensal E. coli. PFGE analysis revealed clusters specific for IBD E. coli isolates (n = 11), for fecal isolates (n = 13), and clusters containing both IBD and fecal isolates (n = 10). ExPEC (Extraintestinal Pathogenic E. coli) virulence and colicin determinants appear to be important characteristics of IBD E. coli isolates, especially the E. coli isolates obtained directly from biopsy samples.
References provided by Crossref.org
Colicin U from Shigella boydii Forms Voltage-Dependent Pores
